BIRMINGHAM, Alabama -- The Icelandic rock band Sigur Ros made its Birmingham debut on Friday night at the BJCC Arena (curtained off to create the 7,500-seat Magic City Theatre). The crowd was small, but the performance was exceptional. Here are some tweets from the 8 p.m. concert:

Julianna Barwick on now at the @BJCC. Her music sounds like the kind of ambient noise that's scientifically engineered to put you to sleep.